iiolsey



(No Model.)

J. H. HOLSEY.

No. 414,54o.

Patented Nov. 5

-Jiwifl lfr y To all whom it may cncern: r

UNITED *STATES PATENT J ULIUS Il; HOLSEY, OF CORSICANA, TEXS.

BLASTlNG-PLUG@ SPECIFICATION forming pari: of 'Letters Patent No. 414,540, dated November 5, 1889.

' A plication fid July 31,1`ss9. Serial No. 39,244.

`- Be it known that I,` J ULIUs H. HOLSEY, a

, citizen of the United States, residing at Corsicana, in the countyof Navarro and State of Texas, have invented new and useful Improvements in Blasting-Plngs, of which the following is a specification.

The invention relates to the blasting-plugs for which Letters Patent were issued to me October 31, 1871, and July 8, 1873, and numbered, respectively, 120, &38 and 140,(328.

The objects of my present invention are to inprove the cfficiency and usefulness of the device, to render it capable of' more general application, to provide a Construction whereby a given charge is rendered more powerful and effective, and to provide a divided blasting-plug, whereby one section can be practically enployed in a drill-hole where it is desired to sliver the timber or where one side of the object to be blasted is liable to fall 3 over a precipice or into water and be lost.

The invention consists nore particularly in a cylindrical blasting-plug divided longitudinally into two separate or independent sections, one of which is formed with a diskhead having a vent-orifice and made c'oeX- tensive with the external when the two sections are placed together in such. nanner that the disk-carrying head-section can be employed alone for blasting purposes by reason of its head accurately filling the drill-hole and acting as a tamp.

The invention also consists in other features of construction; which are hereinafter described and specified in the' claimsyrefrence being made to the accompanying drawings, in whichr Figure 1 is a side elevation of a blastingplug embodying my inven tion. Fig. 2 i a two sections septop plan view showing the I arated; Fig. 3, a perspective View -looking at the'inside of the main plug-section; Fig( 4, a similaryiew of the outer section; and Fig. 5

is a View, on a reduced scale, showing the main plug-section alone-in a drill-hole.

In order to enable those skilled in the art to make and, use my invention, I will now de-.

scribe the same in detail, referring to the drawings, where it Will be seen that the hollow blasting-plug is divided longitudnally into two separate 'or independent caliber of the plug 'blasting operation, .drilled in the timber, rock, or other object The blastv sections 1 {No model.) 'v

and 2, which are toigued and grooved or rabbeted together along their adjoining edges,

as at 3, the object of which is-to prevent the it has in a measure position the vent-orifiee incides with a like Vent-orifice 7 in the diskhead. The two sections are each furnished externally below the disk-head with a series -of circular ridges or ribs 8, extending' trans- Versely round the plug, and those on each' section having their extremities 9* vanishing in the body of the section, all in such manne' that the ridges or ribs engage the wall of the drill-hole and at the time of the explosion retard any tendency of the or out-ward. By having the ends of the-Ch cular ridges' or ribs ,vanish in the bodiesof the sections near the rabbeted edges the sides of the plug alongthe joint are left smooth, as at 10,- to fit the Wall of the drill-hole. The ridges or ribs are-square at the top and beveled inwardly at' the sides, the vanishingpoint being at the square' top of the adjacent ridge or rib. This construction provides for the easy insertion of the plug,but offers great resistance to explosion. v i

The entire plug may be used to effect the and in practice a hole is and the plug inserted therein. ing-charge of powder or other explosive is then introduced through the vent-orifices, a fuse or slowmatch is applied and ignited, and the person retiresto a place of safety. The gascs of'explosives exert a certain pressure to the square inch, and by reason of this plug to fly inward' v IOO there will be little tendency of the plug' tok fly upward or outward lengthwise; but any such tendency is eounteracted by the circular transverseridges. The disk-head,being si i 414,54o

coextensive with the external caliber or diameter of the plug, accurately fits and fills the drill-hole, thereby subserving the function of a tan'p; but in addition to this the disk-head permits the main section' to be used alone in a'drill-holewhen desired, which is frequently .the case where the tinber is to be slivered or where one side of the object to be blasted is liable' to be thrown over a precipice or into water and lost. It will be observed that when the mainsection is used alone, as indicated in Fig. 5, its 'disk-head accurately fits a drill-hole forned of the same size as would receive the entire plug.

By my invention there is` no danger-in the preparation of the blast, for there is no frietion or tamping after the explosive has been introduce&

The section of the plug which carries the disk-head is brace'd and strengthened by an internal rih 12, extending length'wise and jeined to a transverse rib .13 near the upper or enter end of the plug.` Tlisis-desirable for' the 'employment of the ne section alone in 'a dill-hole. The plugs are made of .any size and of material suitable for the conditions required. I" have :repeatedly and successfully used plugs 'of Inalleableiron and fou-nd them safe, effective, and dur-able.

B' y the peculiar 'Construction of the vent end of the plug herein described and shown a longer time is required to separate the two sections and the vent is closed for a longer period, whereby a given charge is rendered mere powerful in its efect, 'this being cau'sed by the closure of the vent during the lal-ast,

which produce's a perfect confin'enent of the fere for a considerable ?time in comparis'on to 'pri'or constructions.

What I claim is- V 1. A holl'ow blasting-plug divided lon'gitu'din'a-lly into two sections and one 'section having 'a disk-head coextensive with the external 'caliber of the plug, 'substa'nti'ally as de- A scribed.

A hollow blasting-plug divided longitudnally into two sections: having their adjoining edges rabbeted together and one'section provided with a disk-head coextensive 'with the external caliber of the plug, sub.-

stantially as described.

3. A hollow blasting-plug divided longitu dinally into independent sections, each having external transverse ridges' pr ribs, and one section provided with a disk-head coextensive with the external caliber of the plug, substantially as described.

4. A hollow blaStjng-plug divided longitudinally into two sections'of unequal length, the short one having a perforated diaphragn at one extremity and the other having a perforated disk-head overlying said diaphragm and coextensive with the external caliber of the plu substanti ally as described.

5. A he'ilow bia'sting-plug havinga vent and divided longitudi-nally into independent sections, one of which is' provided with an internal brace-rib,substantial1y as described.

6. A hollo'w bia'sting-plug divided long'- tudinally into 'two independent sections, and one having an internal brace-rib and a diskhead coextensive with the external caliber ot' the plug, substant'ially as described;

- 7. A hollow blasting-plug having a vent and divided longitu'di'nally into two independent.

sections, each having a series of transverse beveled ribs or ridges gitudinal dividing-line,

extending in a circle round thesame, and 'the ends of which vanish in the body of the section adjacent to the lon- In testimony whereof I have afxed sigv nature in presence of two witnesses.

I .Junus 1-1. HOLSEY. i

XV itnesses A .I. BATES, W. H. MALLOY. 

